Ho sebelisa PTFE ka katleho ho a pompo ea nyeoe ea axial , ke habohlokoa ho utloisisa thepa ea boitsebiso bona. Tse ling tsa thepa e ikhethang ea PTFE e e etsa thepa e ntle haholo bakeng sa ho paka tse lohiloeng:

1. Ho hanyetsa lik'hemik'hale tse babatsehang. Lebaka le ka sehloohong la ho sebelisa PTFE ka ho paka ke hore ha e amehe ke mefuta e mengata ea maro a senyang, ho kenyelletsa le li-acids tse matla, metheo, le li-solvents. Mohlomong ntho ea bohlokoa ka ho fetisisa, PTFE e ka mamella li-oxidizing agents tse matla tse kang nitric acid, chlorine dioxide, le haholo concentrated sulfuric acid (oleum).

2. Coefficient e tlase ea khohlano ha e kopana le libaka tse ngata. PTFE e tsejoa e na le melumo e sa kolobiseng, e boreleli, le e tlase ea likhohlano. Sena se thusa ho fokotsa tšebeliso ea matla le tlhahiso ea mocheso ho sehokelo sa packing-shaft.

Leha PTFE e na le melemo ea eona, tse ling tsa thepa ea eona ha li ntle lits'ebetsong tse ngata tsa ho paka pompo. Mathata a kopanang le ho paka PTFE hangata a bakoa ke thepa ea eona e mpe ea mocheso le mochini:

1. Cold deformation kapa creep tlas'a khatello. Sekhahla se eketseha ka mocheso o ntseng o eketseha. Ha khatello e sebelisoa ho 100% PTFE paka ka nako e itseng, ho paka ka 'na ba le letso-letso le tiileng' me hloka liphetoho khafetsa ho boloka tiiso. E boetse e na le tšekamelo ea ho pepeta likheo tse ka holimo le tse ka tlaase tsa lebokose la stuffing la pompo ea nyeoe ea axial.

2. Low mogote conductivity. Ha mocheso o ferekaneng o hlahisoa o kopane le leqhubu le potolohang ka lebelo le phahameng, PTFE e hloekileng e na le tšekamelo ea ho monya mocheso 'me ha e khone ho e senya ho ea tikolohong e potolohileng. Ho thibela PTFE ho paka hore e se chese kapa e chesoe, ho hlokahala sekhahla se phahameng sa ho lutla sebakeng sa ho paka-shaft.

3. Coefficient e phahameng ea ho atolosa mocheso. Ha mocheso o ntse o eketseha, PTFE e eketseha ka potlako ho feta tšepe e potolohileng. Katoloso ena e eketsa khatello ea ho paka ho axial split case pump shaft le bore.

PTFE Fiber Packing

Baetsi ba bangata ba hlahisa liphutheloana tse sebelisang PTFE e le fiber ea motheo. Lihlahisoa tsena li ka fanoa e le likhoele tse omeletseng, likhoele tse koahetsoeng ka li-dispersions tsa PTFE, kapa likhoele tse tlositsoeng ka litlolo tse fapaneng. Ke mokhoa o motle oa ho sebelisa lihlahisoa tsena feela ha ho se na mokhoa o mong oa PTFE, ho kenyelletsa le lisebelisoa tse nang le lik'hemik'hale tse senyang tse kang li-oxidizer tse matla, kapa bakeng sa lijo kapa mekhoa ea meriana.

Bakeng sa PTFE faeba packing, ho bohlokoa haholo-holo ho khomarela meeli ea moetsi ka mocheso, lebelo, le khatello. Liphutheloana tsena li thata haholo ho lokisoa ha li sebelisoa lisebelisoa tse potolohang. Ka tloaelo, likhatello tse tlase tsa litšoelesa le litekanyetso tse phahameng tsa ho lutla lia hlokahala ho feta ka liphutheloana tse ling.

E Atolositsoeng Polytetrafluoroethylene (ePTFE) Packing

Likhoele tsa ePTFE li tšoana ka ponahalo le tepi ea PTFE. Mofuta o tloaelehileng haholo ke ePTFE e kentsoeng ka graphite ho ntlafatsa conductivity ea eona ea mocheso le lebelo la lebelo. Li-braids tsa ePTFE ha li na kutloelo-bohloko ho mocheso ho feta PTFE fiber packing. EPTFE packing e ka ba le deformation e batang le extrusion ka likhatello tse phahameng.

PTFE Coated packing

Ha khanyetso e ntle ea lik'hemik'hale ea PTFE e hloekileng e sa hlokehe, PTFE e ka koaheloa ka lisebelisoa tse ngata tsa fiber ho ntlafatsa ts'ebetso ea ho paka le ho sebelisa melemo ea PTFE. Likhoele tsena li ka boela tsa thusa ho fokotsa kapa ho felisa bofokoli bo bong ba li-braids tse hloekileng tsa PTFE.

Likhoele tse kopantsoeng ka likhoele tsa maiketsetso le tsa khalase li ka apesoa ka PTFE ho hlahisa liphutheloana tsa moruo, tse feto-fetohang tse nang le botsitso bo phahameng, khanyetso e kholo ea extrusion, le kutlo e fokolang ea tokiso ho feta PTFE fiber braids. Li ka boela tsa apesoa ka motsoako o qhalaneng oa PTFE le graphite ho ntlafatsa bokhoni ba lebelo la braid le litšobotsi tsa ho senya mocheso.

Aramid fiber packing e nang le liphahlo tsa PTFE e ka sebelisoa moo ho hanyetsanang ho feteletseng ho hlokahalang. Novoid fiber packing e nang le PTFE coating e ka sebelisoa litšebeletsong tse senyang hanyenyane 'me e na le botsitso bo betere le ho hanyetsa extrusion ho feta PTFE fiber braids.

PTFE-coated carbon le graphite fiber braids ke tse ling tsa liphutheloana tse nang le mekhoa e mengata haholo. Li na le khanyetso e ntle ea lik'hemik'hale (ntle le li-oxidizing agents tse matla), ts'ebetso ea lebelo le phahameng, ts'ebetso e phahameng ea mocheso, le botsitso bo botle haholo. Ha li na tšekamelo ea ho nolofatsa kapa ho hlahisa mocheso o phahameng hape li bonts'a khanyetso e ntle ea abrasion.

Ka ho utloisisa melemo le mefokolo ea mefuta e fapaneng ea ho paka PTFE e lohiloeng, o ka khetha sehlahisoa se tla kopana hantle le pompo ea hau ea axial split case kapa litlhoko tsa ho tiisa ts'ebetso ea valve.